CN107174805A - Glof club head - Google Patents

Abstract

The present invention provides a kind of ballistic properties high glof club head, and the glof club head is hollow structure and possesses pole face portion, bizet and bottom.The first groove and the second groove for upwardly extending and being recessed to the inner side of bottom with side in toe are formed with bottom.First groove is configured at pole face side compared to the second groove.First groove possesses the first main inwall and the shorter than the first main inwall more than one first secondary inwall, the first main inwall constitutes the inwall to form first groove with the more than one described first secondary inwall, second groove possesses the second main inwall and the shorter than the second main inwall more than one second secondary inwall, and the second main inwall constitutes the inwall to form second groove with the more than one described second secondary inwall.First main inwall and the second main inwall by more to back side then more upward in the way of tilt.When bottom is arranged at into ground, the second main inwall is more steeply tilted compared to the described first main inwall in the profile of side relative to the ground.

Description

Glof club head

Technical field

The present invention relates to a kind of glof club head.

Background technology

The raising of flying distance is the eternal theme of golfer.Therefore, in the design of glof club head, produce The imagination of the various ballistic properties for improving glof club head.

However, Patent Document 1 discloses the glof club head that multiple grooves are formed with bottom.

Prior art literature

Patent document

Patent document 1：No. 8517860 specifications of U.S. Patent No.

Invent problem to be solved

In most cases, being formed at the groove of bottom contributes to the raising of ballistic properties of glof club head.But, If further rising to target with ballistic properties, only formation groove is inadequate, it is necessary to further optimize the structure of groove. Also, the present inventors think, especially in the case where forming multiple grooves, the relative structure to these grooves is carried out Optimization is critically important.

The content of the invention

It is an object of the invention to provide a kind of high glof club head of ballistic properties.

Means for solving the problems

The present invention the first viewpoint involved by glof club head be hollow structure and possess pole face portion, bizet and Bottom.It is formed with the first groove and the second groove in the bottom, first groove and second groove are in toe-upwardly extended with side And be recessed to the inner side of the bottom.First groove is configured at the pole face side of second groove.First groove possesses first Main inwall and shorter than the first main inwall the more than one first secondary inwall, the first main inwall with it is more than one described First secondary inwall constitutes the inwall to form first groove.Second groove possesses the second main inwall and shorter than the second main inwall The more than one second secondary inwall, the second main inwall constitutes to form described the with the more than one described second secondary inwall The inwall of two grooves.The first main inwall and the second main inwall by more to pole face side then more upward in the way of tilt. When the bottom is arranged at into ground, the second main inwall is compared to the described first main inwall, the phase in the profile of side More steeply tilted for the ground.

Glof club head involved by the second viewpoint of the present invention is the glof club head involved by the first viewpoint, institute State the first groove and constituted by being configured at a described first secondary inwall of the described first main inwall of back side with being configured at pole face side, Second groove is by the described second main inwall for being configured at back side and a described second secondary inwall structure for being configured at pole face side Into.

Glof club head involved by the 3rd viewpoint of the present invention is the first viewpoint or the Gao Er involved by the second viewpoint Husband's club head, in the profile of side, along the described first main inwall incline direction imaginary line with along the described second main inwall Incline direction imaginary line the back side of second groove and the lower section of the bottom position intersect.

The present invention the 4th viewpoint involved by glof club head be hollow structure and possess pole face portion, bizet and Bottom.It is formed with the first groove and the second groove in the bottom, first groove and second groove are in toe-upwardly extended with side And be recessed to the inner side of the bottom.First groove is configured at the pole face side of second groove.First groove possesses first Main inwall and shorter than the first main inwall the more than one first secondary inwall, the first main inwall with it is more than one described First secondary inwall constitutes the inwall to form first groove.Second groove possesses the second main inwall and shorter than the second main inwall The more than one second secondary inwall, the second main inwall constitutes to form described the with the more than one described second secondary inwall The inwall of two grooves.The first main inwall and the second main inwall by more to back side then more upward in the way of tilt. When the bottom is arranged at into ground, the first main inwall is compared to the described second main inwall, the phase in the profile of side More steeply tilted for the ground.

Glof club head involved by the 5th viewpoint of the present invention is the glof club head involved by the 4th viewpoint, institute State the first groove and constituted by being configured at a described first secondary inwall of the described first main inwall of pole face side with being configured at back side, Second groove is by the described second main inwall for being configured at pole face side and a described second secondary inwall structure for being configured at back side Into.

Glof club head involved by the 6th viewpoint of the present invention is the 4th viewpoint or the Gao Er involved by the 5th viewpoint Husband's club head, in the profile of side, along the described first main inwall incline direction imaginary line with along the described second main inwall Incline direction imaginary line the back side of first groove and the lower section of the bottom position intersect.

Glof club head involved by the 7th viewpoint of the present invention is involved by any one of first viewpoint to the 6th viewpoint And glof club head, the first main inwall and the second main inwall be formed as in the profile of side it is linear or Be formed as bending in concave shape to the inner side of the bottom.

Glof club head involved by the 8th viewpoint of the present invention is involved by any one of first viewpoint to the 7th viewpoint And glof club head, the bottom also has：First grounding parts, first grounding parts are located at the pole face of first groove Side, and when the bottom is arranged at into the ground, first grounding parts are contacted with the ground；And second grounding parts, Second grounding parts are located between first groove and second groove, and when the bottom is arranged at into the ground, should Second grounding parts are contacted with the ground.

Glof club head involved by the 9th viewpoint of the present invention is the glof club head involved by the 8th viewpoint, when When the bottom is arranged at into the ground, first grounding parts and second grounding parts are constituted in the profile of side For with the ground be in linear contact lay.

Glof club head involved by the tenth viewpoint of the present invention is the 8th viewpoint or the Gao Er involved by the 9th viewpoint Husband's club head, the bottom also has the 3rd grounding parts, and the 3rd grounding parts are located at the back side of second groove, and work as institute When stating bottom and being arranged at the ground, the 3rd grounding parts are contacted with the ground.

Glof club head involved by the 11st viewpoint of the present invention is the first viewpoint to any one of the tenth viewpoint institute The glof club head being related to, at least one of the bottom in the described first main inwall and the second main inwall, also has In the toe-with the side heavy section or flank that upwardly extend.

Glof club head involved by the 12nd viewpoint of the present invention is any one of first viewpoint to the 11st viewpoint Involved glof club head, the bottom at least also has in the position of first groove prolongs at pole face-back on direction The heavy section or flank stretched.

Glof club head involved by the 13rd viewpoint of the present invention is any one of first viewpoint to the 12nd viewpoint Involved glof club head, in toe-with direction, first groove is shorter than second groove.

Glof club head involved by the 14th viewpoint of the present invention is any one of first viewpoint to the 13rd viewpoint At least one party in involved glof club head, first groove and second groove is in a top view with to back side The mode for protruding into convex extends.

Invention effect

According to the present invention, multiple grooves in toe-upwardly extended with side are formed with the bottom of glof club head.Thus, The rigidity reduction of bottom on pole face-back direction, becomes to be easily deformed in square stance bottom, glof club head it is least It can improve.Also, these grooves are recessed to the inner side of glof club head, therefore bottom is internally deformed in square stance.

According to the first viewpoint, the first groove and the second groove are formed with bottom.First groove is configured at bar compared to the second groove Surface side.First groove possesses the first main inwall and the first secondary inwall, and the first main inwall and the first secondary inwall constitute to form the first groove Inwall.First secondary inwall inwall more main than first is short.Second groove possesses the second main inwall and the second secondary inwall, the second main inwall The inwall to form the second groove is constituted with the second secondary inwall.Second secondary inwall inwall more main than second is short.First main inwall and Two main inwalls by more to pole face side then more upward in the way of tilt.In such a configuration, when further in the first viewpoint When bottom is arranged at into ground, the second main inwall is more precipitous relative to ground in the profile of side compared to the first main inwall Ground is tilted.Therefore, when being illustrated using Fig. 7 to one of the first viewpoint of the present invention, drawing from the second main inwall (the Two back side inwalls 22) pole face side end points Q1 to pole face side extend and with the first main inwall (the first back side inwall 12) During the parallel imaginary line V1 ' of incline direction, such imaginary line V1 ' and corresponding with the second main inwall (the second back side inwall 22) Line intersected in the way of describing the line to the inner recess (projecting upwards shape) of head.Pass through the such first main inwall and The relation for the relative tilt that two main inwalls are constituted, and promote the deformation of square stance bottom internally, further make at square stance bottom Portion is easily deformed, so as to further improve the ballistic properties of glof club head.

On the other hand, according to the 4th viewpoint, the first groove and the second groove are formed with bottom.First groove is compared to the second groove It is configured at pole face side.First groove possesses the first main inwall and the first secondary inwall, and the first main inwall and the first secondary inwall constitute shape Into the inwall of the first groove.First secondary inwall inwall more main than first is short.Second groove possesses the second main inwall and the second secondary inwall, and this Two main inwalls constitute the inwall to form the second groove with the second secondary inwall.Second secondary inwall inwall more main than second is short.In first master Wall and the second main inwall by more to back side then more upward in the way of tilt.In such a configuration, when in the 4th viewpoint In when bottom further being arranged at into ground, the first main inwall is compared to the second main inwall, relative to ground in the profile of side Face is more steeply tilted.Therefore, when being illustrated using Figure 10 to one of the 4th viewpoint of the invention, drawing from first The end points Q2 of the back side of main inwall (the first pole face side inwall 11) further to back side extend and with the second main inwall (second Pole face side inwall 21) incline direction parallel imaginary line V4 ' when, such imaginary line V4 ' and with first main inwall (the first bar Surface side inwall 11) corresponding line intersects in the way of describing the line to the inner recess (shape protruding upward) of head.By so The first main inwall and the relation of relative tilt that constitutes of the second main inwall, and promote the deformation of square stance bottom internally, enter One step makes to be easily deformed in square stance bottom, so as to further improve the ballistic properties of glof club head.

Brief description of the drawings

Fig. 1 is the stereogram of the glof club head involved by first embodiment.

Fig. 2 is the top view under the normal condition of the glof club head involved by first embodiment.

Fig. 3 is the profile at Fig. 2 line A-A.

Fig. 4 is from the side view under the normal condition of the glof club head involved by first embodiment in terms of toe side.

Fig. 5 is the upward view under the normal condition of the glof club head involved by first embodiment.

Fig. 6 is the partial enlarged drawing of the bottom near zone by dotted line in Fig. 3.

Fig. 7 is the schematic side profile of the glof club head involved by first embodiment.

Fig. 8 A are the upward views under the normal condition of the glof club head involved by second embodiment.

Fig. 8 B are profiles at Fig. 8 A line B-B.

Fig. 8 C are profiles at Fig. 8 A line C-C.

Fig. 9 A are the upward views under the normal condition of the glof club head involved by the 3rd embodiment.

Fig. 9 B are profiles at Fig. 9 A line D-D.

Fig. 9 C are profiles at Fig. 9 A E-E lines.

Figure 10 is the schematic side profile of the glof club head involved by the 4th embodiment.

Figure 11 is the upward view under the normal condition of the glof club head involved by variation.

Figure 12 is the upward view under the normal condition of the glof club head involved by other variations.

Figure 13 is the upward view under the normal condition of the glof club head involved by other further variations.

Symbol description

2 bizets

3 bottoms

7 pole face portions

10 grooves (the first groove)

20 grooves (the second groove)

11 pole face side inwalls (the first pole face side inwall)

12 back side inwalls (the first back side inwall)

21 pole face side inwalls (the second pole face side inwall)

22 back side inwalls (the second back side inwall)

31 first grounding parts

32 second grounding parts

33 the 3rd grounding parts

40 flanks

50 flanks

H ground

Embodiment

Hereinafter, the glof club head involved by several embodiments of the invention is illustrated while referring to the drawings.

The first embodiment ＞ of ＜ 1.

The summary ＞ of ＜ 1-1. glof club heads

Fig. 1 is the glof club head (following, to there is the situation of simply referred to as " head ") 100 involved by first embodiment Stereogram, Fig. 2 is the top view under the normal condition of head 100.Normal condition on glof club head is seen below.Head 100 be hollow structure, and wall is formed by pole face portion 7, bizet 2, bottom 3 and bar neck 5.Involved by present embodiment Head 100 is rod (#1) type.

Face component 1 includes pole face portion 7, and constitutes the forward portion of the head 100 of batting.Bizet 2 is adjacent with pole face portion 7 Connect, and constitute the upper surface of head 100.Bizet 2 is bent into be protruded upward.Bottom 3 constitutes the bottom surface of head 100, and and bar Face 7 and bizet 2 are abutted.Bottom 3, which is bent into, protrudes downwards.In addition, bar neck 5 is provided adjacent in bizet 2 with side Position, and with the patchhole 51 of shaft (the omit diagram) insertion for golf clubs.The central axis Z of the patchhole 51 It is consistent with the axis of shaft.

Here, being illustrated to said reference state.As shown in Figure 1 and Figure 2, state on the basis of state is provided as follows： The central axis Z of shaft is contained in respect to the horizontal plane vertical (ground) H (reference picture 3 and Fig. 4) plane (hereinafter referred to as Reference vehicular face) P, and with defined head inclination angle and actual loft the placing head in horizontal H state.And And, as shown in Fig. 2 reference vehicular face P and the intersection of horizontal H direction are referred to as into toe-with direction, will relative to the toe-with Direction is vertical and with respect to the horizontal plane parallel H direction is referred to as pole face-back direction.Also, will with respect to the horizontal plane H it is vertical Direction be referred to as Top-Bottom direction.In addition, in description of the present embodiment, as long as no especially forbidding, " front and rear " refers to Pole face-back direction, before pole face side is, after back side is.Also, as long as no especially forbidding, " up and down " refers to Top-Bottom Direction, top side is upper, under bottom side is.In addition, " ... side is upwardly extended " it is not limited to what is extended parallel to " ... direction " Situation, can obliquely extend approximately along " ... direction " extension or relative to " ... direction ".

Head 100 can be formed for example by proportion for 4.4~5.0 or so titanium alloy (for example, Ti-6Al-4V).Also, In addition to titanium alloy, in can also utilizing such as stainless steel, Maraging steel, aluminium alloy, magnesium alloy and non-crystaline amorphous metal One or more formed.Also, metal material is not limited to, can also be formed by fiber-reinforced plastic etc..

What the head 100 involved by present embodiment was substantially made up of assembling bizet 2, bottom 3 and bar neck 5 The head main body 6 of hollow structure is constituted with the main face component 1 being made up of pole face portion 7.Head main body 6 and face component 1 Engaged for example, by welding (TIG (tungsten-inert gas) welding, Plasma Welding, laser welding, soldering etc.).Head main body 6 There is opening in front, face component 1 is installed on head main body 6 in the way of clogging the opening.Head main body 6 can also be by more Individual part assembles, and can also be integrally formed.This head main body 6 and face component 1 can be made by a variety of methods. For example, head main body 6 can also be manufactured by the casting of known lost wax process etc..Also, face component 1 can be with The modes such as punch process, casting for example, by forging preparation method or flat board are manufactured.In addition, the portion of head 100 described herein Part structure is example, can also be assembled by the multiple parts different from this.

Hereinafter, face component 1 is illustrated in reference picture 3.Fig. 3 is the profile at Fig. 2 line A-A.Such as Fig. 1~ Shown in Fig. 3, the face component 1 of present embodiment is so-called cup-shaped pole face type.That is, face component 1 is formed as having impact ball Flat pole face portion 7 and the cup-shaped of rising portions (extension) 8 that rearward extends of the periphery from pole face portion 7.This cup-shaped The face component 1 of pole face type due to the face component 1 that easily uprises of rigidity and head main body 6 junction surface than pole face portion 7 more to Rear is remote, is subject to deflection so pole face portion 7 is overall.Therefore, cup-shaped pole face structure contributes to the increase of flying distance.

In addition, Fig. 3 is by pole face center Fc, with toe-with the orthogonal profile in direction.Here, pole face center Fc is determined Justice is as follows.First, in pole face portion 7, the line x, line x with toe-parallel with direction are drawn in optional position in the vertical direction Midpoint Px be determined.Then, in pole face portion 7, it is drawn through point Px and the line y parallel with above-below direction, the midpoint of the line Py is determined.Then, as line x again draw the point Py by so being determined and with the line of toe-parallel with direction, its Afterwards, the process for redefining point Py same as described above is repeated.In the repetitive process of this process, when last point When the distance between Py and new point Py is below 1mm, the new point Py is defined as pole face center Fc.In addition, the survey of length Surely it is the surface measurements along pole face.

In addition, for head 100, try to improve the ballistic properties of head 100 for the purpose of the increase of flying distance, it is special It is not the ballistic properties of bottom 3.Also, in head 100, while trying to improve hair elasticity energy, also try to realize centre of gravity Change.Hereinafter, the feature being related to is described in detail.

The structure ＞ of ＜ 1-2. bottoms

Fig. 4 is that, from the side view under the normal condition of head 100 in terms of toe side, Fig. 5 is facing upward under the normal condition of head 100 View.Fig. 6 is the partial enlarged drawing of the scope near the bottom 3 of dotted line in Fig. 3.As shown in Fig. 3~Fig. 6, in bottom 3 Outer surface formed oriented bottom 3 inner side depression multiple (being in the present embodiment two) grooves 10,20.As shown in figure 5, Groove 10,20 all toe-with side upwardly extend.Protruded in addition, groove 10,20 is bent into back side.Also, groove 10,20 pole face- Arranged on the direction of back, the almost parallel extension in upward view.Also, the groove closer to pole face side is groove 10 (the first groove), more Groove close to back side is groove 20 (the second groove).Hereinafter, groove 10 is referred to as the first groove 10, groove 20 is referred to as the second groove 20.

These grooves 20 of the first groove 10 and second help to reduce rigidity of the bottom 3 on pole face-back direction.That is, by In the presence of the first groove 10 and the second groove 20, become easy, head upwardly-deformed in pole face-back side in square stance bottom 3 100 ballistic properties are improved.

Also, as shown in fig. 6, the first groove 10 and the second groove 20 involved by present embodiment are in the profile of side Roughly triangular shape.In addition, " side section " refers to and toe-with the orthogonal section in direction.First groove 10 is by being used as pole face side The back side inwall 12 (the first main inwall) of the pole face side inwall 11 (the first secondary inwall) and the inwall as back side of inwall is drawn It is fixed.Pole face side inwall 11 and back side inwall 12 are linear in the profile of side.Hereinafter, by the pole face side of the first groove 10 Inwall 11 is referred to as the first pole face side inwall 11.The back side inwall 12 of first groove 10 is referred to as the first back side inwall 12.

Similarly, the second groove 20 is also by the pole face side inwall 21 (the second secondary inwall) of the inwall as pole face side with being used as the back of the body The back side inwall 22 (the second main inwall) of the inwall of portion side delimited.Pole face side inwall 21 and back side inwall 22 are cutd open in side It is linear in the figure of face.Hereinafter, the pole face side inwall 21 of the second groove 20 is referred to as the second pole face side inwall 21.By the second groove 20 Back side inwall 22 is referred to as the second back side inwall 22.

Also, the back side inwall 12 of the first pole face side inwall 11 to the first is short.Similarly, the second pole face side inwall 21 to the Two back side inwalls 22 are short.In addition, the first back side 12 length in the profile of side of inwall refers to, in the profile of side Link the length of the straight line of the two-end-point (being in this case end points of the end points with back side of pole face side) of the first back side inwall 12 Degree.For the second back side inwall 22, the first pole face side inwall 11 and the second pole face side inwall 21 in the profile of side Length, is also same implication.

Inwall 11,12,21,22 is continuous in the position (described later first being grounded with ground H in normal condition lower bottom part 3 Grounding parts 31, the second grounding parts 32, the 3rd grounding parts 33) it is continuous.First pole face side inwall 11, the second pole face side inwall 21 are distinguished Extend rearward and obliquely upward from the first grounding parts 31, the second grounding parts 32.In other words, the first pole face side inwall 11 and second Pole face side inwall 21 respectively by more towards back side then more upward in the way of tilt.First back side inwall 12, second is carried on the back Portion side inwall 22 is grounded 33 forwards from the second grounding parts the 32, the 3rd respectively and extended obliquely upward.In other words, the first back side Inwall 12 and the second back side inwall 22 respectively by more towards pole face side then more upward in the way of tilt.In first pole face side Wall 11 be combined with each other with the first back side inwall 12 in the end of respective upper side.The joint portion is the most deep of the first groove 10 Portion.Second pole face side inwall 21 be combined with each other with the second back side inwall 22 in the end of respective upper side.The joint portion is The most deep of second groove 20.In addition, in the present embodiment, the first back side inwall 12, the first pole face side inwall 11, second back of the body Portion side inwall 22, the second pole face side inwall 21 are respectively equivalent to the first main inwall of the present invention, the first secondary inwall, in the second master Wall, the second secondary inwall.

In the present embodiment, the first groove 10 is compared with the second groove 20, wide in the longitudinal direction and in the vertical direction It is shallow.On the other hand, the second groove 20 is narrow in the longitudinal direction and deep in the vertical direction compared with the first groove 10.Here, will set Depth at the most deep of the first groove 10 when putting state on the basis of head 100 is set to d1, and by the fore-and-aft direction of the first groove 10 On width be set to w1.Also, the depth at the most deep of the second groove 20 on the basis of setting head 100 during state is set to D2, and the width on the fore-and-aft direction of the second groove 20 is set to w2.Now, in the present embodiment, d2 ＞ d1, w1 ＞ w2.This Outside, the depth of the first groove 10 and the second groove 20 refers on the above-below direction under the normal condition of head 100 from the H of ground Depth.Also, in the present embodiment, the width w1 on the fore-and-aft direction of the first groove 10 is the rear end and the of the first grounding parts 31 Width w2 on the distance between front end of two grounding parts 32, the fore-and-aft direction of the second groove 20 be the second grounding parts 32 rear end with The distance between front end of 3rd grounding parts 33.

However, because the durability of impact during relative to strike is pursued in pole face portion, so being typically designed as pole face portion It is high compared to bottom rigid.Therefore, in the vicinity in pole face portion, the rigidity of bottom is uprised, and is difficult to deform so as to there is bottom. Therefore, the groove being located near pole face portion of bottom contributes to the structure of the rigid decline of bottom, but this helps degree and compared For the groove of back side is located closer to its to help degree small.Such case is in the head 100 involved by present embodiment Also identical, the average wall thickness of the average wall ratio bottom 3 in pole face portion 7 is thicker, and pole face portion 7 is high compared to the rigidity of bottom 3.Cause This, herein, d2 ＞ d1 as described above.That is, the shape of the second groove 20 closer to back side of rigidity decline is contributed effectively to As relatively deep, also, the first groove 10 closer to pole face side for being comparatively difficult to contribute to rigidity to decline is formed as phase To shallower.As a result, mainly ballistic properties are effectively improved by the second groove 20 of back side on one side, while by by pole face First groove 10 of side, which is made shallower, prevents position of centre of gravity from uprising.That is, low center of gravity is realized.

Also, preferably w1/d1 ＞ 1, more preferably w1/d1 ＞ 3, it is further preferred that w1/d1 ＞ 6.Such as Under the conditions of this, the first groove 10 is relatively wide in the longitudinal direction, relatively shallower in the vertical direction, and then can balance well Meet the raising and the opposite requirements of the two scripts of the low center of gravity of head 100 of the ballistic properties of bottom 3.Also, it is preferred that It is w2/d2 ＞ 1, more preferably w2/d2 ＞ 3, it is further preferred that w2/d2 ＞ 5.Under such conditions, the second groove 20 exists It is relatively wide on fore-and-aft direction, it is relatively shallower in the vertical direction, and then the ballistic properties for meeting bottom 3 well can be balanced Raising and the low center of gravity of head 100 the two opposite requirements originally.Also, it is excellent from the viewpoint of more than similar Choosing is 15mm≤w1≤50mm, preferably 5mm≤w2≤40mm.Also, preferably 0.3mm≤d1≤4mm, preferably It is 0.5mm≤d2≤5mm.It is further preferred that d2/w2 ＞ d1/w1.

More than d1, d2, w1, w2 involved by quantitative condition in the present embodiment, be formed with the first groove 10, the The toe of two grooves 20-with being set up on direction throughout whole region.But, these conditions can also be toe-with direction it is local into It is vertical.In this case it is preferably, at least on the section by pole face center Fc and with toe-orthogonal with direction, i.e. Fig. 3 and figure On section shown in 6, these conditions are set up.

Here, under normal condition, the length of the head 100 on pole face-back direction is set to L1, will be from head 100 Most front side point (point of the most front side of leading edge) pole face-back direction untill the edge of the pole face side of the second groove 20 on Length is set to L2 (reference picture 5).In addition, L1 be from head 100 most front side point to head 100 most rear side point untill Length on pole face-back direction.Now, in the present embodiment, preferably L2/L1 >=0.4, more preferably L2/L1 >=0.45, it is further preferred that L2/L1 >=0.5.Because under such conditions, the second groove 20 is configured at compared with rear.That is, second Groove 20 is not readily susceptible to the influence of the property for being difficult to deform of bottom 3 as caused by the high rigidity in pole face portion 7, can be effectively Improve the ballistic properties of bottom 3.

Moreover it is preferred that L2/L1≤0.8, more preferably L2/L1≤0.7, it is further preferred that L2/L1≤ 0.6.Because under such conditions, the second groove 20 is not moved back excessively rearward.That is, rearward being dropped when the second groove 20 is excessively moved back When, i.e., when too far away from pole face side, deformation during strike is difficult to the vicinity for feeding through to the second groove 20, can make near the second groove 20 Deflection is reduced.Also, the second groove 20 can also make the second groove 20 attached too close to the shell of the high back side of the rigidity of head 100 Near deflection is reduced.Therefore, from the viewpoint of ballistic properties are improved, preferably the second groove 20 be configured to not move back excessively to Rear.

L2 is defined on the basis of the edge of the pole face side of the second groove 20 of bending, thus according to toe-with direction Position and change, but in the present embodiment, value conditions involved by the L2/L1 of the above throughout be formed with the toe of groove 20-with Whole region on direction is set up.But, the value conditions of the above can also be in toe-with locally being set up on direction.In the situation Under, it is preferred that at least by pole face center Fc and with toe-with the orthogonal section in direction, i.e. Fig. 3 and cuing open shown in Fig. 6 On face, above-mentioned value conditions are set up.

And as shown in fig. 6, in the present embodiment, it is arranged in bottom 3 under ground H normal condition, the second back Side inwall 22 is more steeply tilted compared to the first back side inwall 12 in the profile of side relative to ground H.In addition, the The gradient of one back side inwall 12 refers in the profile of side, links the two-end-point of the first back side inwall 12 (in the feelings The end points of end points and the back side of pole face side under condition) straight line gradient.For the second back side inwall 22, the first pole face The gradient of the pole face side inwall 21 of side inwall 11 and second is also identical.

In the present embodiment, as shown in fig. 6, respectively constitute the first groove 10, the first back side inwall 12 of the second groove 20, Second back side inwall 22 is tilted, especially by more from the lateral back side of pole face then downwards in the way of, i.e. groove depth shoals Mode tilt.Thus, it is difficult to hit with ground H (lawn) in bottom when swinging 3 of golf clubs, easily from the H of ground Slide.Also, as present embodiment, in the first back side inwall 12 and the inclined situation of the second back side inwall 22 Under, the effect that the rigidity of bottom 3 declines is obtained by the first groove 10 and the second groove 20, while bottom 3 can will be constituted The the first back side inwall 12 and the second back side inwall 22 of a part are configured at lower section as much as possible, therefore, it is possible to further Realize low center of gravity.

Here, as shown in fig. 7, in the profile of side, it is considered to the end points Q1 from the pole face side of the second back side inwall 22 Further extend and the imaginary line V1 ' parallel with the incline direction of the first back side inwall 12 to pole face side.Now, such vacation Think line V1 ' and with the corresponding line of the second back side inwall 22 (along the second back side inwall 22 but not out of second back side The line that the end points Q1 of the pole face side of wall 22 extends to pole face side) intersected in the way of the line that the interior side described to head 100 is recessed. In other words, in the profile of side, along the first back side inwall 12 incline direction imaginary line V1 with along the second back The imaginary line V2 of the incline direction of side inwall 22 intersection point P1 is located at the lower section of glof club head 100 and compared to the second groove 20 Closer to the position of back side.However, bottom 3 is due to the first groove 10 of inner side depression to bottom 3 and depositing for the second groove 20 And square stance easily to the interior side deformation of head 100.In this regard, by by the first back side inwall 12 as described above with The relation for the relative tilt that second back side inwall 22 is constituted, and promote the deformation in the interior side to head 100 of the bottom 3, And further improve the ballistic properties of glof club head 100.In addition, Fig. 7 is in order that explanation is readily appreciated that and highlights the The schematic side profile of the head 100 of the shape facility of one groove 10 and the second groove 20.

In the present embodiment, the first back side inwall 12 and the second back side inwall 22 are in side profile cathetus Extend shape.Therefore, with these positions 12,22 to originate, the position of the vicinity of the first groove 10 and the second groove 20 becomes easy Bent to the interior side of head 100.In addition, in other implementations, position 12,22 is unnecessary linearly extends for these, For example, can also in concave shape be bent to the inner side of bottom 3 in the profile of side.Also it is identical in this case, head 100 Bottom 3 becomes easily inwardly side's flexure.Also, in these cases, the first back side inwall 12, the second back side inwall 22 Gradient is also respectively defined as in the profile of side, links the first back side inwall 12, the two ends of the second back side inwall 22 The gradient of the straight line of point (being in this case the end points and the end points of back side of pole face side).

The lower end of first pole face side inwall 11, the i.e. forward end of the first groove 10 under the normal condition of head 100 with ground H Contact.Also, the lower end of the first back side inwall 12, the i.e. rear square end of the first groove 10 under the normal condition of head 100 with ground Face H is contacted.Likewise, the lower end of the second pole face side inwall 21, i.e., the forward end of the second groove 20 is under the normal condition of head 100 Contacted with ground H.Also, the lower end of the second back side inwall 22, i.e. normal condition of the rear square end of the second groove 20 in head 100 It is lower to be contacted with ground H.As a result, head 100 is by being contained in the first grounding parts 31, the second grounding parts 32 and of bottom 3 3 points of three grounding parts 33 and contacted under normal condition with ground H.In addition, the first grounding parts 31, the first groove 10, second are grounded Portion 32, the second groove 20 and the 3rd grounding parts 33 are arranged in order from the lateral back side of pole face.As known from the above, in golfer When head 100 is shown into normal condition, head 100 is by multiple dot points on the H of ground, and then makes the stabilization of head 100.In addition, Even if omitting any one in the first grounding parts 31, the second grounding parts 32, the 3rd grounding parts 33, even if being connect for example, omitting the 3rd Ground portion 33, head 100 is still by two dot points, therefore, it is possible to make the stabilization of head 100.Also, in the present embodiment, the first ground connection The grounding parts 32 of portion 31 and second are flat in the profile of side, and are in linear contact lay with ground H in the profile of side.Cause This, the head 100 under normal condition had both been difficult to forwards or had been difficult to rearward fall down, and the head 100 under normal condition is further It is stable.

Here, return to Fig. 5, throughout toe-the second groove 20 is formed with the substantially whole region on direction on bottom 3, On bottom 3 only toe-with direction nearly toe side formed the first groove 10.Therefore, in the present embodiment, the first groove 10 of pole face side Compared to back side the second groove 20 in toe-with short on direction.As a result, being formed with the toe of the first groove 10-with the position in direction Put, i.e. the position in toe side, ballistic properties are extraordinarily improved.In addition, be formed with the toe of the first groove 10-with direction position not It is defined in this example.That is, first can be formed selectively wanting especially to improve the toe of ballistic properties-with the optional position in direction Groove 10.But, as shown in figs. 11 and 12, can also be on bottom 3, throughout toe-with the substantially whole region on direction To form the first groove 10.

In the present embodiment, the first groove 10 and the second groove 20 are depicted in toe-with the central attached of direction in upward view The circular arc (sweep) that proximad back side is protruded.As a result, can make from the pole face center Fc of batter's box concentration to the first groove Toe-with whole region direction on roughly equal of 10 distance in the first groove 10.Likewise, for the second groove 20, also can Make from pole face center Fc to the distance of the second groove 20 the second groove 20 toe-roughly equal with the whole region on direction.Thus, The first groove 10 and the vicinity of the second groove 20 can be made effectively to deform in square stance.In addition, the first groove 10 can be formed like Such convex shape, can also be formed as with toe-extended parallel to direction, or also can on the contrary as shown in figure 13, with It is depicted in toe-formed with the mode of the neighbouring circular arc (sweep) prominent to pole face side in center in direction.For the second groove 20 It is identical.

Also, in the present embodiment, the weight 60 for adjusting position of centre of gravity is installed in bottom 3, with further real Existing low center of gravity.In the example of fig. 5, weight 60 is configured at the rear of bottom 3 near toe-with the substantial middle on direction, The center of gravity of head 100 is adjusted to close to the center of back side.In addition, the quantity and installation site of weight 60 are not limited to this In example, any number of weight 60 can be installed on by optional position according to the position of centre of gravity of design object.For example, In Figure 11 example, not only at the rear of bottom 3, also weight 60 is installed in the position with side in the first groove 10, can make weight The heart is close to side.Also, the weight 60 at the rear in the example in figure 12, without bottom 3, and toe side in the first groove 10 with And with side, weight 60 is installed in the two places, can make center of gravity close to pole face side.In Figure 13 example, by positioned at bottom 3 The weight 60 at rear is moved slightly towards toe side, and the position with side in the first groove 10 is also provided with weight 60.

The second embodiment ＞ of ＜ 2.

Hereinafter, the glof club head 200 involved by second embodiment is illustrated in reference picture 8A~Fig. 8 C. In addition, the head 200 involved by second method and the most part of head 100 involved by first embodiment are common 's.Therefore, hereinafter, in order to simple, for the composition additional identical reference marks common with first embodiment and omit Illustrate, only main pair illustrates with the difference of first embodiment.

The main difference of head 200 and the head 100 involved by first embodiment involved by second embodiment Point is that the medial surface in bottom 3, which is formed with flank, (can also be referred to as heavy section.Following also identical.)40.Further, since Flank 40 is formed at the medial surface of bottom 3, therefore can not confirm originally in upward view, but in fig. 8 a, for the side of explanation Just, flank 40 is represented by dashed line.As shown in Fig. 8 A~Fig. 8 C, the flank 40 is in pole face-back side of the first back side inwall 12 Upward center is nearby along toe-extend with direction.Especially in the present embodiment, flank 40 is extended to throughout toe-with direction Substantially whole region.Also, in fig. 8 a, flank 40 linearly extends, but flank 40 can also be for example, along the first groove 10 shape, which is bent into back side, to be protruded.

Even if setting such flank 40, the rigid increase in pole face-back direction is also smaller, therefore, it is possible to substantially maintain Ballistic properties on pole face-back direction.On the other hand, flank 40 can improve the toe of bottom 3-with the rigidity on direction, because This can make impact sound high pitch.

Such flank 40 is not limited to the first back side inwall 12, can also be formed at the second back side inwall 22.Also, Such flank 40 can also be arranged at multiple places.

The embodiment ＞ of ＜ 3. the 3rd

Hereinafter, the glof club head 300 involved by the 3rd embodiment is illustrated in reference picture 9A~Fig. 9 C. In addition, the head 300 involved by the 3rd embodiment and the most part of head 100 involved by first embodiment are altogether Logical.Therefore, hereinafter, in order to simple, for the composition additional identical reference marks common with first embodiment and save Slightly illustrate, only main pair illustrates with the difference of first embodiment.

The main difference of head 300 and the head 100 involved by first embodiment involved by 3rd embodiment Point is that the medial surface in bottom 3, which is formed with flank, (can also be referred to as heavy section.Following also identical.)50.Further, since Flank 50 is formed at the medial surface of bottom 3, therefore can not confirm originally in upward view, but in figure 9 a, for the side of explanation Just, flank 50 is represented by dashed line.As shown in Fig. 9 A~Fig. 9 C, the flank 50 across both the first groove 10 and the second groove 20 and Along pole face-back direction extension.Especially in the present embodiment, flank 50 crosses the first groove 10 and the second groove 20 completely.But, Flank 50 can also be configured to only in the position of the first groove 10 extend without the location overlap with the second groove 20.

In the present embodiment, flank 50 is configured at nearly toe side on bottom 3.As a result, formed flank 50 toe-with Position on direction, i.e. the position in toe side, it is possible to increase the rigidity of bottom 3 simultaneously suppresses ballistic properties.On the other hand, toe- The position of flank 50 is not provided with direction, the raising of ballistic properties brought by the first groove 10 and the second groove 20 is maintained.This Outside, the toe-be not limited to this example with the position on direction of flank 50 is formed, can want to suppress the toe of ballistic properties-with side Upward optional position is formed selectively flank 50.And such flank 50 can be arranged at multiple places.

The embodiment ＞ of ＜ 4. the 4th

Hereinafter, the glof club head 400 involved by the 4th embodiment is illustrated in reference picture 10.In addition, The most part of head 100 involved by head 400 and first embodiment involved by 4th embodiment is common. Therefore, hereinafter, in order to simple, for the composition additional identical reference marks common with first embodiment and omit Bright, only main pair illustrates with the difference of first embodiment.

Head 400 involved by the 4th embodiment difference main with head 100 involved by first embodiment It is, delimit the first groove 10, the gradient of the inwall 11,12,21,22 of the second groove 20.As shown in Figure 10, in present embodiment In, the first back side inwall 12 is configured to shorter than the first pole face side inwall 11, and the second back side inwall 22 is configured to than the second bar Surface side inwall 21 is short.In the present embodiment, the first pole face side inwall 11, the first back side inwall 12, the second pole face side inwall 21st, the second back side inwall 22 is respectively equivalent to the first main inwall of the present invention, the first secondary inwall, the second main inwall, the second pair Inwall.

In addition, the first groove 10 is compared with the second groove 20, it is narrow in the longitudinal direction and deep in the vertical direction.Also, second Groove 20 is wide in the longitudinal direction compared with the first groove 10, and shallow in the vertical direction.That is, with first embodiment on the contrary, d1 ＞ D2, w2 ＞ w1.Also, in the present embodiment, d2/w2 ＜ d1/w1.

Also, in the present embodiment, it is arranged in bottom 3 under ground H normal condition, the phase of the first pole face side inwall 11 Than in the second pole face side inwall 21, more steeply being tilted relative to ground H in the profile of side.

Here, as shown in Figure 10, in the profile of side, it is considered to enter from the back side point Q2 of the first pole face side inwall 11 One step extends and the imaginary line V4 ' parallel with the incline direction of the second pole face side inwall 21 to back side.Now, such imagination Line V4 ' and with the corresponding line of the first pole face side inwall 11 (along the first pole face side inwall 11 and not from the first pole face side inwall 11 The lines that extend to back side of back side point Q2) intersected in the way of describing the line to the inner recess of head 400.Change speech It, in the profile of side, along the first pole face side inwall 11 incline direction imaginary line V3 with along in the second pole face side The imaginary line V4 of the incline direction of wall 21 intersection point P2 be located at glof club head lower section and compared to the first groove 10 closer to The position of pole face side.As a result, in the 4th embodiment, also identically with first embodiment, bottom 3 is promoted in square stance Deformation internally, and improve the ballistic properties of glof club head 400.In addition, Figure 10 is in order that explanation is readily appreciated that The shape facility for emphasizing the first groove 10 and the second groove 20 head 400 schematic side profile.

In the present embodiment, the first pole face side inwall 11 and the second pole face side inwall 21 are in side profile cathetus Extend shape.Therefore, it is starting with these positions 11,21, the first groove 10, the position of the vicinity of the second groove 20 become easily to bar First 400 inside flexure.In addition, in other implementations, position 11,21 is unnecessary linearly extends for these, for example, Can also in concave shape it be bent to the inner side of bottom 3 in the profile of side.Also it is identical in this case, the bottom 3 of head 400 Become easily internally to bend.

Also, the head 400 involved by the 4th embodiment can also be formed second and the 3rd embodiment flank 40th, 50 at least one party.

The variation ＞ of ＜ 5.

More than, it is illustrated for several embodiments of the invention, but the present invention is not limited to above-mentioned embodiment party Formula, in the case where not departing from its purport, can there is a variety of deformations.For example, can have following deformation.Also, following change The purport of shape example can be appropriately combined.

＜ 5-1 ＞

In the above-described first embodiment, the first back side inwall 12 is extended to throughout pole face-back side of the first groove 10 Upward width w1 substantially whole region.Also, the second back side inwall 22 is extended to throughout pole face-back of the second groove 20 The major part of width w2 on direction.But, the first back side inwall 12 and the second back side inwall 22 are not limited to this.

In the present invention, " main inwall " refers to be formed in multiple inwalls of each groove, and the length on pole face-back direction is than each 50% big inwall of the width (length) on the pole face of groove-back direction.It is somebody's turn to do " main inwall " and one is only existed in each groove. Also, in the present invention, " secondary inwall " refers to the short inwall of length ratio " main inwall ".

I.e., in the first embodiment, the first back side inwall 12 and the second back side inwall 22 are equivalent to " main inwall ". Therefore, the first back side inwall 12, the second back side inwall 22 have more than the first groove on pole face-back direction respectively 10th, 50% length of the width (length) of the second groove 20, the length is not limited further.In addition, in first embodiment In, the first pole face side inwall 11 and the second pole face side inwall 21 are equivalent to " secondary inwall ".The length of these inwalls 11,21 can be fitted Locality changes.

In addition, also can similarly be changed for the 4th embodiment.For example, in the 4th embodiment equivalent to " main inwall " of the invention is the first pole face side inwall 11 and the second pole face side inwall 21.Therefore, in the 4th embodiment, The first pole face side inwall 11, the second pole face side inwall 21 also have more than the first groove 10, the on pole face-back direction respectively 50% length of the width (length) of two grooves 20, the length is not limited further.

＜ 5-2 ＞

Also, for the angle of inclination for each inwall for forming the first groove 10 and the second groove 20, it is not limited to above-mentioned first Angle shown in embodiment.In the first viewpoint of the present invention, as long as the first main inwall and the second main inwall are with more to bar The mode of surface side then more upward is tilted, the second main inwall compared to the first main inwall in the profile of side relative to ground more Steeply tilt, then the angle of inclination of other inwalls is not particularly limited.For example, in the first embodiment, the first back Side inwall 12 is equivalent to the first main inwall of the present invention, second main inwall of the second back side inwall 22 equivalent to the present invention.Cause This, in the range of the above-mentioned tilt relationship that the first back side inwall 12 and the second back side inwall 22 meet the present invention, first The angle of inclination of back side inwall 12 and the second back side inwall 22 can suitably change.

Also, in the first embodiment, the angle of inclination of the first pole face side inwall 11 and the second pole face side inwall 21 Also it is not particularly limited.For example, these inwalls 11,21 can obliquely upward extend towards front, it can also prolong to vertical direction Stretch.

In addition, also can similarly be changed for the 4th embodiment.For example, in the 4th embodiment, first Pole face side inwall 11 is equivalent to the first main inwall of the present invention, and the second pole face side inwall 21 is equivalent in the second master of the present invention Wall.Therefore, in the 4th embodiment, as long as also the first pole face side inwall 11 and the second pole face side inwall 21 are with more to back The mode of side then more upward is tilted, and the first pole face side inwall 11 is compared to the second phase in the profile of side of pole face side inwall 21 More steeply tilted for ground, then the angle of inclination of the first pole face side inwall 11 and the second pole face side inwall 21 can be carried out Suitably change.

＜ 5-3 ＞

Also, in the above-described first embodiment, the first groove 10 by be configured at the first back side inwall 12 of back side with It is configured at the first pole face side inwall 11 of pole face side the two inwalls composition.Second groove 20 is by being configured at the second back of back side Side inwall 22 is with being configured at the second pole face side inwall 21 of pole face side the two inwalls composition.But, in the present invention, as long as the One groove possesses the first main inwall and the more than one first secondary inwall, the first main inwall and the more than one first secondary inwall structure The inwall of first groove is shaped as, and the second groove possesses the second main inwall and the more than one second secondary inwall, in second master Wall constitutes the inwall to form second groove with the more than one second secondary inwall, then does not do remaining restriction.For example, implementing first In mode, the first back side inwall 12 is equivalent to the first main inwall of the present invention, and the first pole face side inwall 11 is equivalent to the present invention The first secondary inwall.Second back side inwall 22 equivalent to the present invention the second main inwall, the second pole face side inwall 21 equivalent to The secondary inwall of the second of the present invention.

Thus, for example in the first embodiment, can also be in the first pole face side inwall 11 and the first back side inwall 12 Between accompany more than one other inwalls.Also, can also be between the first pole face side inwall 11 and the first grounding parts 31 Accompany more than one other inwalls.Can also be accompanied between the first back side inwall 12 and the second grounding parts 32 one with On other inwalls.In the case where accompanying other inwalls like this, the section shape of groove has the quantity with its inwall It is corresponding polygon-shaped.Also, the structure of the inwall for the second groove 20, can also carry out changing in the same manner as the first groove 10. For example, in the second groove 20, other can also be further added by addition to the second pole face side inwall 21 and the second back side inwall 22 Inwall.

Also, for the 4th embodiment, also can similarly it be changed.For example, the first of the 4th embodiment In groove 10, other inwalls can also be further added by outside the first pole face side inwall 11 and the first back side inwall 12.Also, In the second groove 20, other inwalls can also be further added by outside the second pole face side inwall 21 and the second back inwall 22.

＜ 5-4 ＞

In the above-described embodiment, the quantity for being formed at the groove of bottom 3 is two, but its quantity is not limited to this, It can be more than three.In this case, two adjacent grooves are equivalent to the first groove and the second groove in the present invention.

＜ 5-5 ＞

In the above-described embodiment, glof club head is set to a Wood-type, but its type not limited to this, example Such as or such as the other Wood-types or so-called Mobyneb, mixed type of Fairway Woods.

＜ 5-6 ＞

Face component 1 can not also cup-shaped pole face type, for example, it is also possible to be as omit rising portions 8 template and with It is formed at the opening portion welding in pole face portion.

Claims (14)

1. a kind of glof club head, the glof club head is hollow structure, and possesses pole face portion, bizet and bottom, its It is characterised by,

It is formed with the first groove and the second groove in the bottom, first groove and second groove are in toe-upwardly extended with side And be recessed to the inner side of the bottom,

First groove is configured at the pole face side of second groove,

First groove possesses the first main inwall and the shorter than the first main inwall more than one first secondary inwall, and described first Main inwall constitutes the inwall to form first groove with the more than one described first secondary inwall, and second groove possesses the second master Inwall and shorter than the second main inwall the more than one second secondary inwall, the second main inwall and more than one described the Second mate's inwall constitutes the inwall to form second groove,

The first main inwall and the second main inwall by more to pole face side then more upward in the way of tilt,

When the bottom is arranged at into ground, the second main inwall is compared to the described first main inwall, in side profile In more steeply tilted relative to the ground.

2. glof club head according to claim 1, it is characterised in that

First groove is in the described first main inwall for being configured at back side and first pair for being configured at pole face side Wall is constituted,

Second groove is in the described second main inwall for being configured at back side and second pair for being configured at pole face side Wall is constituted.

3. glof club head according to claim 1 or 2, it is characterised in that in the profile of side, along described first The imaginary line of the incline direction of main inwall with along the described second main inwall incline direction imaginary line second groove the back of the body The position of the lower section of portion side and the bottom intersects.

4. a kind of glof club head, the glof club head is hollow structure, and possesses pole face portion, bizet and bottom, its It is characterised by,

It is formed with the first groove and the second groove in the bottom, first groove and second groove are in toe-upwardly extended with side And be recessed to the inner side of the bottom,

First groove is configured at the pole face side of second groove,

First groove possesses the first main inwall and the shorter than the first main inwall more than one first secondary inwall, and described first Main inwall constitutes the inwall to form first groove with the more than one described first secondary inwall,

Second groove possesses the second main inwall and the shorter than the second main inwall more than one second secondary inwall, and described second Main inwall constitutes the inwall to form second groove with the more than one described second secondary inwall,

The first main inwall and the second main inwall by more to back side then more upward in the way of tilt,

When the bottom is arranged at into ground, the first main inwall is compared to the described second main inwall, in side profile In more steeply tilted relative to the ground.

5. glof club head according to claim 4, it is characterised in that

First groove is in the described first main inwall for being configured at pole face side and first pair for being configured at back side Wall is constituted,

Second groove is in the described second main inwall for being configured at pole face side and second pair for being configured at back side Wall is constituted.

6. the glof club head according to claim 4 or 5, it is characterised in that in the profile of side, along described first The imaginary line of the incline direction of main inwall with along the described second main inwall incline direction imaginary line first groove the back of the body The position of the lower section of portion side and the bottom intersects.

7. according to glof club head according to any one of claims 1 to 6, it is characterised in that the first main inwall with And the second main inwall is formed as linear in the profile of side or is formed as bending in concave shape to the inner side of the bottom.

8. according to glof club head according to any one of claims 1 to 7, it is characterised in that

The bottom also has：First grounding parts, first grounding parts are located at the pole face side of first groove, and work as the bottom When portion is arranged at the ground, first grounding parts are contacted with the ground；And second grounding parts, second grounding parts are located at Between first groove and second groove, and when the bottom is arranged at into the ground, second grounding parts with it is described Ground is contacted.

9. glof club head according to claim 8, it is characterised in that when the bottom is arranged at into the ground When, first grounding parts and second grounding parts are configured to the ground be in linear contact lay in the profile of side.

10. glof club head according to claim 8 or claim 9, it is characterised in that the bottom also has the 3rd ground connection Portion, the 3rd grounding parts are located at the back side of second groove, and when the bottom is arranged at into the ground, the 3rd connects Ground portion is contacted with the ground.

11. according to glof club head according to any one of claims 1 to 10, it is characterised in that the bottom is described At least one in first main inwall and the second main inwall, also with the heavy section or rib in the toe-upwardly extended with side Portion.

12. the glof club head according to any one of claim 1~11, it is characterised in that the bottom at least exists The position of first groove also has the heavy section or flank upwardly extended in pole face-back side.

13. the glof club head according to any one of claim 1~12, it is characterised in that in toe-with direction, First groove is shorter than second groove.

14. the glof club head according to any one of claim 1~13, it is characterised in that first groove and At least one party in second groove is extended in the way of protruding into convex to back side in a top view.